bcopy: Deprecate module

[Bruno Haible]

clang on native Windows gives me this warning:

gllib\bcopy.c(27,1): warning: no previous prototype for function 'bcopy' 
[-Wmissing-prototypes]

The normal way to fix this would be to add a '#include <strings.h>' in
lib/bcopy.c. But our <strings.h> does not even provide a declaration of
this function! It relies on AC_REPLACE_FUNCS and a K&R C compiler.

Instead of putting effort into this outdated module, it is better to just
mark it as deprecated.


2024-08-27  Bruno Haible  <bruno@clisp.org>

        bcopy: Deprecate module.
        * modules/bcopy (Status, Notice): Mark as deprecated.
        * doc/pastposix-functions/bcopy.texi: Mention that this module does not
        declare bcopy().

diff --git a/doc/pastposix-functions/bcopy.texi 
b/doc/pastposix-functions/bcopy.texi
index 73ab4ea24f..c4676d9013 100644
--- a/doc/pastposix-functions/bcopy.texi
+++ b/doc/pastposix-functions/bcopy.texi
@@ -19,4 +19,6 @@
 @item
 This function is removed in POSIX.1-2008.  Better use @code{memcpy}
 or @code{memmove} instead.
+@item
+This module does not arrange to declare this function.
 @end itemize
diff --git a/modules/bcopy b/modules/bcopy
index d4a2bb93b7..146fb90c6a 100644
--- a/modules/bcopy
+++ b/modules/bcopy
@@ -1,6 +1,12 @@
 Description:
 Old BSD bcopy() function: copy memory area.
 
+Status:
+deprecated
+
+Notice:
+This module is deprecated because the standard way to copy memory is memcpy().
+
 Files:
 lib/bcopy.c